sinivetikate ja mõnede teiste bakterite elutegevuse toimel mere- või magevees tekkiv, valdavalt karbonaatsetest mineraalidest kihiline moodustis
a layered accretionary structure formed in shallow water by the trapping, binding, and cementation of sedimentary grains by biofilms of microorganisms, especially cyanobacteria
estructura sedimentaria, calcárea, que se caracteriza por una laminación fina y ondulada
roche calcaire et/ou structure marine biogénique et organique laminée double-couche
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